OFDM Broadcast Signal Framing for Multi-Service QoS Robustness
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting and receiving large amounts of data, particularly in providing multiple broadcast services through the same RF signal bandwidth, ensuring robustness and flexibility, especially for mobile reception equipment and indoor environments.
Innovation Solution
The implementation of an apparatus that encodes service data, builds signal frames using Orthogonal Frequency Division Multiplexing (OFDM), and transmits broadcast signals, allowing for the classification and processing of data components as data pipes, enabling flexible transmission and reception of broadcast signals across various services and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple broadcast services are transmitted through the same RF signal bandwidth, then transmission efficiency is improved, but signal robustness and reception quality deteriorate
Solution Approach 1:
The patent segments broadcast services into different service flows, each independently processed through separate encoding and modulation paths. This allows multiple services to share the same RF bandwidth while maintaining individual service quality and robustness through dedicated processing chains.
Solution Approach 2:
The patent implements dynamic resource allocation where transmission parameters such as modulation order, coding rate, and power distribution are adaptively adjusted for each service flow based on channel conditions and service requirements, enabling both high transmission efficiency and maintained signal robustness.
2Adaptability or versatility
If data is classified and processed as separate data pipes, then service flexibility and QoS control are improved, but system complexity increases
Solution Approach 1:
The patent divides the broadcast data stream into multiple service flows, with each service flow further segmented into data pipes for independent processing. This hierarchical segmentation enables fine-grained QoS control and service flexibility while managing complexity through modular architecture.
Solution Approach 2:
The patent implements a universal processing framework where the same encoding, modulation, and multiplexing modules handle multiple service flows and data pipes. This multi-functional approach provides service flexibility without proportionally increasing system complexity, as the same hardware/software blocks serve multiple purposes.
Data Source
AI summary
The present invention provides an apparatus of transmitting broadcast signals, the apparatus including, an encoder for encoding service data, a frame builder for building at least one signal frame by mapping the encoded service data, a modulator for modulating data in the built at lease one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, scheme and a transmitter for transmitting the broadcast signals having the modulated data.